I asked this a month ago without getting any responses, so I'll give it
one more try:

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We recently ran into an issue with debug/development mode when making
z3c.hashedresource work with Zope2: The package implements different
behaviour depending on whether the dev-mode feature is enabled in the ZCML
of a Zope3 application, and we sort of expected this feature to be
automatically enabled or disabled in a Zope2 application using Five when
Zope2 debug-mode is switched on or off, resp. As this doesn't seem to be
the case, we were wondering a few things:
- Is Zope2 debug mode semantically equivalent to ZCML dev-mode, i.e.
should the two be linked to each other in the first place?
- If so, is it a bug that ZCML dev-mode isn't controlled by Zope2 debug
mode in a Five application? Or is it and we're just missing something?
- If the the two should be connected but aren't, what's the best way to
fix things? Should this be fixed in Five? Otherwise, how to achieve
switching on the ZCML dev-mode feature the right way?
Independently of these questions, wouldn't it make sense for ZCML to have,
in addition to "feature" and "installed", a conditional verb "expression"
that allows referencing a Python expression defined in a module whose
boolean value to use for deciding the condition?
--
Thomas
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